Explain How Different Factors Can Affect a Population Gene Pool

By Da_Madison115 17 Apr, 2022 Post a Comment

Together the forces of natural selection genetic drift and founder effect can lead to significant changes in the gene pool of a population. The allele frequency in a population can be affected in the following ways -.

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Mutation Mutation leads to the formation of new species and hence change in allelic frequencies.

. The composition of a populations gene pool can change over time through evolution. Immigration from other parts of the world over the last several hundred years has changed the gene pool a lot. For example the migration of human populations.

Genetic drift Genetic drift refers to the unintentional movement of alleles into or out of a gene pool. A number of factors including the populations genetic structure and the environment. In areas where a higher percentage of the population have sickle cell anemia there is also malaria a disease caused by and transmitted by People living in areas where.

The size of the gene pool directly affects the evolutionary trajectory of that population. Organisms dying mutations organisms moving out of a populations. According to Hardy-Weinberg Equilibrium law the relative frequency of alleles in the population remains constant from.

Genetic Change in Populations 2 Objectives Explain how different factors affect from SCIENCE 101 at Connections Program. What 3 things can change a gene pool. The processes of mutation natural selection migration and genetic drift all affect the gene pool and change the frequency of the alleles in that gene pool.

This can occur by a variety of mechanisms including mutations natural selection and genetic drift. If new individuals of the species move into or out of the region it can affect the gene pool. If someone from outside of your gene pool were to have a child inside of your population it could possibly affect the gene pool of your population.

The term genetic load describes the accumulation of mutations within a population. Over time a populations gene pool may change. Genetic drift can result in the loss of rare alleles and can decrease the size of the gene pool.

Scientists have found a correlation between the sickle cell trait and. Mutation is a spontaneous change in DNA. A populations individuals often display different phenotypes or express different alleles of a particular gene which scientists refer to as polymorphisms.

Genetic drift can also cause a new population to be genetically distinct from its original population which has led to the hypothesis that genetic drift plays a role in the evolution of new species. Ig what four factors can cause evolution to occura- natural selection mutation gene. Gene pool is the total number of alleles present in a population.

The greater the genetic load the less healthy a. Environmental factors such as diet oxygen level humidity light cycles can influence which of a animals genes are expressedwhich is the phenotype Disruptive selection Directional selection. The amount of each gene in a gene pool can change over time because of chance.

- When a section of population migrates to some other region then there is change in the gene frequencies and new allele or gene are added to the population. A variety of different factors can account for these changes including migration of new individuals into the. No genetic drift changes in allele frequency due to random events So we can conclude that if any of the above conditions are not met then there is a change in allele frequency and thus evolution and thus that factor is the cause of evolution.

Therefore many different populations with very different and uniform gene pools can all originate from the same larger population. As natural selection works on a population the gene pool changes. If individuals leave a population now the population will have slightly different genetic makeup.

Nonrandom mating means that individuals are choosing mates based on specific traits. This can occur by a variety of mechanisms including mutations natural selection and genetic drift. Frequency of an allele occurrence of.

The result is a gene pool that is altered to be attuned to the needs of the populations specific environment. Five factors that can affect frequency of an allele in a gene pool. We call populations with two or more variations of particular characteristics polymorphic.

If there is a change in a gene it can create new traits in an individual and affect the populations gene pool. What four factors can cause the frequency of alleles and genotypes in a populations gene pool to change. Both genetic factors and factors can affect the distribution of a trait in the gene pool.

List at least three factors that can affect the genetic variation within a population. No gene flow immigration or emigration from the population no mutatation. Population size mate selection gene flow mutations natural selection.

A Mutations B Recombinations during Sexual Reproduction C Genetic Drift D Gene Migration Gene Flow E Natural Selection. The theory of evolution states that natural selection acts on a population to favor the desirable traits for that environment while simultaneously weeding out the unfavorable characteristics. Genetic migration or Genetic drift.

Genetic change is the change in frequency of alleles in the gene pool of a population. The result is a gene pool that is altered to be attuned to the needs of the populations specific environment. Gene migration or gene flow Gene migration also known as gene flow is the movement of alleles into and out of a gene pool.

Some of the major factors which affect the genetic equilibrium and induce the variability in population are as follows. The composition of a populations gene pool can change over time through evolution. For instance the only people in North America were once Native Americans.

Gene Flow Understanding Evolution